JPH042451Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a cassette detection mechanism in a novel cassette device. Specifically, in a cassette device such as a video tape recorder (hereinafter referred to as ``VTR''), in which a cassette is mounted in a predetermined position and then performs a predetermined operation, the cassette device itself can be The object of the present invention is to provide a cassette detection mechanism for a novel cassette device that can reliably detect the presence or absence of a cassette at a predetermined position and prevent malfunctions.

BACKGROUND ART For example, in a cassette device such as a VTR, it is necessary to perform a predetermined operation after the cassette is set in a predetermined position, such as a loading operation in which the tape is pulled out from the cassette and wound around a head drum.

If, for example, a loading operation is performed before the cassette is set in the specified position, the tape may be damaged or the loading operation may be performed even though the cassette is set in the specified position. This may cause accidents such as slipping.

Purpose of the invention Therefore, the present invention aims to prevent malfunctions by making it possible to reliably detect the presence or absence of a cassette at a predetermined position in a cassette device that performs a predetermined operation after a cassette is installed in a predetermined position. It is also an object of the present invention to provide a new cassette detection mechanism in a cassette device which prevents the cassette device from becoming larger.

Summary of the Invention In order to achieve the above-mentioned purpose, the cassette detection mechanism in the cassette device of the present invention is designed to hold the cassette and move between the mounting position where the cassette is attached and removed and the setting position where the cassette is set in a predetermined state. a lock member that engages with an engaging portion provided on the cassette holder to lock the cassette holder in the set position; a switch operating member which is movable in a direction orthogonal to the locking member and is biased with a moving force to move in the direction in which the locking member engages with the engaging portion, that is, in the same direction as the engaging direction; and the locking member. a switch operated by the switch operation member that moves in the same direction as the lock member when the switch moves in the engagement direction; a first position on a movement trajectory of the switch operation member; and a first position on the movement trajectory of the switch operation member; and a cassette detection member having a fulcrum on or near an extension of the moving direction of the switch operating member, the cassette holding portion being in the mounting position. At this time, the cassette detecting member is in the first position and prevents the switch operating member from moving in the engaging direction due to the moving force, and when the cassette holding section comes to the set position, the cassette detecting member is in the first position. Alternatively, the switch operating member is moved to the second position by being pressed by the cassette, and the switch operating member is moved in the engaging direction by the moving force to operate the switch.

Operation Therefore, according to the cassette detection mechanism in the cassette device according to the present invention, while the cassette detection member is in the first position, the switch is not operated by the switch operation member, and the cassette detection member is in the first position. The switch is not operated by the switch operation member until the switch is moved to the second position, and the cassette detection member is moved to the second position when the cassette holder comes to the set position. It is possible to prevent the predetermined operation from being performed before the predetermined setting position is reached, and in addition, the switch operating member is made movable in a direction perpendicular to the direction of movement of the cassette holder, and the cassette detection member is made movable. Since the cassette device is rotatable, malfunction of the cassette device can be prevented without increasing the size of the cassette holding member of the cassette device itself in the moving direction, that is, without increasing the size of the cassette device itself.

Embodiment The details of the cassette detection mechanism in the cassette apparatus of the present invention will be explained below with reference to the illustrated embodiment. The drawing shows an example in which the present invention is applied to a cassette detection mechanism in a video camera in which a VTR is integrally incorporated.

Reference numeral 1 denotes a video camera in which a VTR is integrally incorporated, and is composed of a photographing section 3 including a photographing lens 2 and a VTR deck section 4 disposed behind the photographing section 3. An image pickup tube (not shown) is arranged behind the photographing unit 3, and the optical image of the subject passing through the lens 2 is converted into an electrical video signal by the image pickup tube, and the video signal is sent to the VTR deck. It is configured so that magnetic recording is performed on a magnetic tape via a magnetic head provided in the section 4. Reference numeral 5 denotes an optical view finder provided on the top of the photographing section 3 in a foldable state so that it can be protruded toward the side of the camera 1. 6
is a handle that also serves as a battery holder.
It is rotatably provided at the front lower part of the deck part 4. The handle 6 is designed to be locked at several predetermined angles, and can be unlocked and rotated by pressing a lock release button 7 provided at its base end. I can do it. When using the camera 1, the handle 6 is locked in the state approximately shown in FIG.
You can stably operate the VTR deck section 4 by carrying it on your shoulder and holding the handle 6 in your hand. When the camera 1 is not in use, rotate the handle 6 upwards and use the longitudinal direction of the VTR deck section 4. By placing it along the front, the camera can be stored compactly. 8 is a recording microphone, and the audio captured by this microphone 8 is sent to the VTR deck section 4.
The recording medium is configured to be magnetically recorded on a magnetic tape via a magnetic head provided in the magnetic tape. 9,9 is
A cover is attached to the VTR deck section 4, 10 is a cassette mounting section movably provided with respect to the VTR deck, and 11 is a cover attached to the outside of the cassette mounting section 10. .

Reference numeral 12 designates a tape cassette for a VTR. Two tape reels each having a magnetic tape (not shown) wound thereon from both ends are disposed within the case of the tape cassette 12.
The front part of the case, which is the tape drawer part 2, is covered with a cover 13 that can be opened and closed.

Next, the tape cassette holding mechanism 14 provided in the VTR deck section 4 will be explained. 15 is
This is the chassis of the VTR deck section 4. 16, 16
is the direction above the chassis 15, that is, the direction diagonally downward to the left in FIG. (The downward direction is defined as the front side, and the opposite direction is defined as the rear side). Engagement shafts 17 and 18 that engage with the tape reel of the tape cassette 12 are integrally provided on the stands 16 and 16, respectively. 1
Reference numeral 9 denotes a support wall erected along the rear edge of the chassis 15, and the support wall 19 extends in the left and right directions when viewed from the rear (for convenience of explanation, the direction diagonally downward to the left in FIG. 2 is referred to as the left). (the opposite direction is defined as the right side), and the mounting pieces are bent forward in an L-shape from the lower edge of both left and right ends and are fixed to the chassis 15 with screws. It is attached to the upper surface of the chassis 15. 20 is the support wall 19
The guide hole 20 is formed at a position closer to the left side of the support wall 19, and the guide hole 20 is formed obliquely from a position closer to the chassis 15 on the left side of the support wall 19 to the opposite side of the chassis in the middle part. The left end of 20 is cut out in an arc shape toward the chassis. A notch 21 that is long in the left-right direction is formed at approximately the middle of the support wall 15 . Reference numeral 22 denotes a support piece formed so as to protrude downward from a substantially midway position in the left-right direction of the lower end edge of the support wall 19, and a horizontally elongated guide hole 2 is provided at the upper end of the support piece 22.
3 is formed.

Reference numeral 24 denotes a support wall that is erected at a position close to the front edge of the chassis 15 so as to face the support wall 19 in parallel with the support wall 19;
A guide hole 25 is formed which has the same shape as the guide hole 20 formed in the guide hole 20 and is formed at a position opposite to the position where the guide hole 20 is formed.

Reference numeral 26 denotes a cassette holding section, which is formed into a substantially frame shape that is opened in the left-right direction and on the opposite side of the chassis by a bottom plate 27 and side plates 28 and 29 that are integrally raised from both front and rear ends of the bottom plate 27. . and,
The side plates 28 and 29 of the cassette holding part 26 have guide holes 3 extending substantially parallel to the chassis surface from the center toward the opposite edge of the chassis to the left side.
0 and 30' are formed, and a pipe-shaped reinforcing beam 31 is spanned between the right portions closer to the edges opposite to the chassis.

32, 33 and 32', 33' are legs that support the cassette holding part 26 movably relative to the support walls 19 and 24, respectively.
6 is located between the supporting walls 19 and 24 by these legs 32, 33 and 32', 33', i.e.
It is supported so as to be freely movable between a set position and a floating position away from the chassis 15, that is, a floating position. That is, the base ends of the legs 32, 32' are rotatably supported by the side plates 28, 29 of the cassette holding section 26, and the free ends of the legs 32, 32' are rotatably supported by the free ends. roller 3
4, 34' are slidably engaged with the inclined guide holes 20, 25, so that the supporting walls 19, 24
It is supported so as to be movable along guide holes 20 and 25 relative to the guide holes 20 and 25. The legs 33 are formed into a substantially L-shape. The bent portion of the leg 33 and the base end of the leg 33' are rotatably supported by the support walls 19 and 24, respectively, and each tip of the leg 33 and 33' is supported by a roller rotatably supported by the corresponding portion. 35,
35' is movably engaged with the guide holes 30, 30' formed in the side plates 28, 29 of the cassette holding part 26, thereby making it movable with respect to the side plates 28, 29 of the cassette holding part 26. Supported. The substantially central portions of the legs 32 and 33 are rotatably connected, and the substantially central portions of the legs 32' and 33' are also rotatably connected.

36 is a tension coil spring; one end of the spring 36 is engaged with an engagement piece 37 that projects inward from the left end of the notch 21 formed in the support wall 19; is attached to the tip of a bent portion 33a bent downward of the leg 33, and the tip of the bent portion 33a is constantly pulled toward the left of the support wall 19 by a spring 36. Therefore, the end of the leg 33 that is engaged with the guide hole 30 formed in the side plate 28 of the cassette holder 26 is always urged to move toward the opposite side of the chassis 15. The cassette holding portion 26 is moved through its guide hole 30 by such rotational biasing force.
is pushed away from the support walls 19, 24 by the roller 35 at the tip of the leg 33 toward the opposite side of the chassis.
That is, it is urged away from the chassis 15. The tension coil spring 36 is located within the cutout 21 of the support wall 19.

Reference numeral 38 denotes a protrusion protruding toward the chassis 15 from approximately the center of the chassis side end of one side plate 28 of the cassette holding portion 26, and the distal end of the protrusion 38 has a protrusion extending toward the right. A protruding lock pawl 39 is formed, and the lower tip of the lock pawl 39 is formed into an inclined edge 40 that is displaced upward as it approaches the tip.

As a result, the cassette holder 26 moves from the floating state of the chassis 15 shown in FIG. 2 to the chassis 15.
5, the legs 32 and 33 and the legs 32' and 33' are rotated so as to be folded into each other. The protrusion 38 is moved toward the support walls 19 and 24 and placed between the support walls 19 and 24 (set position), and in this state, the lock pawl 39 of the protrusion 38 that has been moved downward is locked by a lock member to be described later. , whereby the cassette holding section 26 is locked at the set position. When the cassette holder 26 thus locked at the set position is unlocked from the lock pawl 39, the legs 33 are rotated by the tensile force of the spring 36, so that the cassette holder 26 is in the position shown in FIG. It is returned to the floating state from the chassis 15 shown.

41 is a lock arm, and the cassette holding part 2
6 in the set position.
The lock arm 41 has its lower end connected to the support wall 1.
It is rotatably supported at a position near the lower end of a support piece 22 formed at 9. 42 is a roller;
It is rotatably supported by a support pin 43 provided at the swinging end of the lock arm 41. When the cassette holder 26 reaches the set position, the roller 42 provided at the swinging end of the lock arm 41 engages with the upper edge of the lock pawl 39 provided on the cassette holder 26 (see Fig. 6C). ), thereby locking the cassette holder 26 in the set position.

Reference numeral 44 denotes a switch operation plate, which functions as a switch operation member for operating a switch for detecting a cassette, which will be described later. The switch operation plate 44 has an elongated hole 45 and a notch 46 formed to extend in the left-right direction, and support pins 47 and 47 embedded in the support wall 19 and slidably engaged with the elongated hole 45 and the notch 46. It is supported by the support wall 19 so as to be slidable in the left and right direction.

48 is a coil spring, and a support member 49 is fixed to the right end of the switch operation plate 44 (the left end in FIGS. 5 and 6) and the support wall 19.
This coil spring 48 causes the switch operation plate 44 to move to the left (the 5th direction).
It is urged by a force to move rightward in the drawings and FIG. 6 (this direction is referred to as the "engaging direction").

Reference numeral 50 denotes an action plate that is integrally formed at the left end (the right end in FIGS. 5 and 6) of the switch operation plate 44, and is positioned approximately at right angles to the switch operation plate 44. The left end of the action plate 50 is integrally connected to the left end of the lower edge of the switch operation plate 44. 51 is a switch pressing piece formed by bending downward at a right angle from the right end (left end in FIGS. 5 and 6) of the action plate 50;
Reference numeral 2 designates an engagement piece formed by bending upward from the left end of the action plate 50 at a right angle.

The switch operation plate 44 as described above is rotatably connected to the swinging end of the lock arm 41. That is, the support pin 43 supported at the swinging end of the lock arm 41 is inserted into a vertically elongated hole 53 formed in the switch operation plate 44 and slidably into the guide hole 23 formed in the support piece 22 of the support wall 19. engaged. Therefore, the pin 43 is inserted into the guide hole 23.
Switch operation plate 44 within the range that can be moved along
The lock arm 41 and the lock arm 41 behave integrally. That is, when the switch operation plate 44 moves to the right in FIGS. 5 and 6, the lock arm 41 is rotated clockwise, and when the switch operation plate 44 similarly moves to the left, the lock arm 41 is rotated counterclockwise. Rotated. Conversely, lock arm 41 is the fifth
If the switch operation plate 44 is rotated clockwise in the figures and FIG. 6, the switch operation plate 44 is moved to the right.
When the lock arm 41 rotates counterclockwise, the switch operation plate is moved to the left.

54 is a cassette detection switch;
It is supported at the lower part of 9. This switch 54
When the contacts 55a and 56a provided at the tips of the two contact pieces 55 and 56 come into contact, a cassette detection signal is obtained, and subsequent operations, such as a tape loading operation, are performed. The two contact pieces 55 and 56 are connected to the switch operation plate 44 with the contacts 55a and 56a slightly spaced apart from each other.
It is located on the movement locus of the switch pressing piece 51 provided in the. Therefore, when the switch pressing piece 51 moves to the right in FIGS. 5 and 6, the contact piece 55 is moved to the right by the switch pressing piece 51, and the contact 55a of the contact piece 55 and The contact point 56a of the contact piece 56 makes contact. Also, by moving the switch pressing piece 51 from the position of the switch 54 to the left in FIGS. 5 and 6,
The contact piece 55 returns to its original state due to its elasticity,
Contact points 55a and 56a are separated.

A cassette detection lever 57 is made of synthetic resin and functions as a cassette detection member for detecting that the cassette 12 is at a predetermined set position. The cassette detection lever 57 is rotatably supported by a pin 58 installed near the left end of the support wall 19. The cassette detection lever 57 is formed with an engaging surface 59 facing rightward at a position close to its pivot point, and a tentacle piece 60 slightly protruding upward from the pivot end. 61
is a torsion spring, the middle part of which is fitted onto the base of the pin 58, and the tip of one action bowl 61a supports the left end of a stopper piece 62 formed by bending at right angles from the lower edge of the left end of the support wall 19. It is engaged with a notch 63 formed across the portion in contact with the wall 19 and the portion in contact with the left end stopper piece 62 of the support wall 19, and is also engaged with the other working bowl 61b.
comes into elastic contact with the lower surface of the cassette detection lever 57, whereby the cassette detection lever 57 is biased with a rotational force such that its rotation end is displaced upward.
Reference numeral 64 denotes a protrusion protruding leftward from the base end of the cassette detection lever 57. When the protrusion 64 abuts against the upper surface of the stopper piece 62, the cassette detection lever 57 is moved by the torsion spring 61. The above rotation is prevented (see FIG. 5), and in this state, the engaging surface 59 is connected to the switch operation plate 44.
It is arranged to be located on the movement locus of the engaging piece 52 provided in the. Therefore, the lock arm 41
When no load other than the tensile force of the coil spring 48 is applied to the switch operation plate 44, the engagement piece 52 engages the engagement surface 59 of the cassette detection lever 57.
The switch pressing piece 51 is thereby separated from the contact piece 55 of the cassette detection switch 54 in the opposite direction.

A switch 65 is supported by the support member 49. The contact pieces 66 and 67 of the switch 65 are provided so that contact points 66a and 67a provided at their tips are vertically spaced apart.
When 6a and 67a come into contact, a recordable signal is output.

68 is a switch operator, and the supporting member 4
9 so as to be movable in the vertical direction, and is always elastically biased to move upward. When the operator 68 moves downward against the elastic force applied thereto, its lower end presses the contact piece 66 of the switch 65, thereby causing the contact 66a of the contact piece 66 to 67 contacts 67
is brought into contact with a. When the operator 68 is moved upward by the elastic force applied thereto, the contact piece 66 returns to its original state due to the elastic force, and the contact 66a of the contact piece 66 and the contact piece 67 The contact point 67a is separated from the contact point 67a.

Next, the operation of the cassette detection mechanism in the above-described cassette device will be explained with reference to FIGS. 5 and 6.

First, in a state where the cassette holding part 26 is furthest away from the chassis 15, that is, in the mounting position (the state shown in FIG. 5), the cassette holding part 26 is
Attach the tape cassette 12 to the cassette.

Next, the cassette holder 26 is pressed from above and brought closer to the chassis 15. Then, first, the lower surface of the bottom plate 27 of the cassette holding part 26 comes into contact with the tentacle piece 60 of the cassette detection lever 57 (see FIG. 6A) and presses the tentacle piece 60 downward. Detection lever 5
7 rotates counterclockwise in FIG. 6 against the force of the torsion spring 61, and the tentacle piece 60 moves downward. Accordingly, the engaging surface 59 of the cassette detection lever 57 also gradually moves downward. Then, since the protruding piece 38 of the cassette holding part 26 also moves downward, the bottom plate 2 of the cassette holding part 26
The lower surface of 7 is the tentacle piece 60 of the cassette detection lever 57.
At approximately the same time as the protruding piece 38 comes into contact with the lock claw 39, the inclined edge 40 of the lock pawl 39 provided at the lower end of the protruding piece 38 comes into contact with the roller 42 of the lock arm 1. Then, as the protruding piece 38 further descends, the roller 42 becomes inclined. It moves to the left in FIG. 6 while rolling on the edge 40.
Therefore, the lock arm 41 rotates so that its swinging end moves to the left in FIG. 6, and the pin 43 presses the left edge of the vertical hole 53 of the switch operation plate 44 in FIG. , the switch operation plate 44 is moved in the anti-engagement direction against the tensile force of the coil spring 48.

As described above, the engaging surface 59 of the cassette detection lever 57 eventually completely separates from the locus of movement of the engaging piece 52 of the switch operation plate 44 (see FIG. 6B), and therefore There is no longer any obstacle to the rightward movement in FIG. 6, but at this point the roller 42 of the lock arm 41 is still
is a lock claw 39 provided on the cassette holding portion 26.
Because it collides with the tip of the switch operation plate 44
is pressed by the pin 43 of the lock arm 41 and held at the position closest to the left in FIG.

Then, when the cassette holding part 26 is further lowered and the upper edge of the lock pawl 39 goes below the position of the roller 42, there is no longer anything to prevent the switch operation plate 44 from moving in the engagement direction. , the switch operation plate 44 is a coil spring 48.
The tension force causes the elongated hole 45 and the notch 46 to move in the engagement direction until the left end in FIG. 6 abuts against the support pins 47, 47. Therefore, at the same time, the switch pressing piece 51 is also moved in the engaging direction and presses the contact piece 55 of the cassette detection switch 54, bringing the contact point 55a and the contact point 56a of the contact piece 56 into contact with each other. (See Figure 6C). Then, when the force pressing the cassette holder 26 downward is removed, the cassette holder 26 is moved upward by the force of the coil spring 36, but the upper edge of the lock pawl 39 immediately touches the roller of the lock arm 41. 42, thereby holding the cassette holding portion 2
6 is now locked in the set position.

Note that when the cassette 12 whose erroneous erasure prevention claw (not shown) on the bottom of the cassette has not been removed is mounted on the cassette holder 26 and moved to the set position, the upper end of the operator 68 is moved downward by the erroneous erasure prevention claw. Since the switch 65 is pressed, the contacts 66a and 67a of the switch 65 are brought into contact with each other by the operator 68, and the switch 65 becomes ready for recording. In addition, if the cassette 12 attached to the cassette holder 26 has the accidental erasure prevention claw removed, the operator 68 will not be pressed from above, so no recordable signal will be output, and the cassette 12 will not be accidentally erased. In other words, it is possible to prevent new recordings from being made over records that should not be erased.

When taking out the tape cassette 12 after recording, the tape is first unloaded, and when the tape unloading operation is completed, the switch operation plate 44 is moved in the anti-engagement direction by means not shown. At the same time, the lock arm 41 is rotated counterclockwise in FIG. To this end, the cassette holder 26 is moved by the tensile force of the coil spring 36 to the mounting position farthest from the chassis 15. During this period, the switch pressing piece 51 of the switch operation plate 44 separates from the contact piece 55 of the switch 54, moving from FIG. 6C to FIG. 6A and then to FIG. The cassette detection lever 57 is rotated by the force of the torsion spring 61 so that its tip is displaced upward again, and then the switch operation plate 44 is moved to the right in FIG. The engaging piece 52 engages with the engaging surface 59 of the cassette detection lever 57, returning to the state shown in FIG.

Effects of the invention As is clear from the above description, the cassette detection mechanism of the cassette device of the present invention is
A cassette holding part that holds the cassette and moves between a mounting position where the cassette is attached/detached and a set position where the cassette is set in a predetermined state, and a cassette holding part that engages with an engaging part provided on the cassette holding part. A locking member for locking the cassette holder at the set position; and a locking member that is movable in a direction orthogonal to the moving direction of the cassette holder in conjunction with the locking member, and the locking member engages with the engaging portion. a switch operating member that is biased with a moving force to move in the same direction as the engaging direction; and a switch operating member that moves in the same direction as the locking member when the locking member moves in the engaging direction. A switch operated by a member, and a switch that rotates between a first position on a movement trajectory of the switch operation member and a second position off the movement trajectory, and a switch that is rotated in the movement direction of the switch operation member. a cassette detection member having a fulcrum on or near an extension of the cassette detection member;
When the cassette holder is in the set position, the cassette detection member is in the first position and prevents the switch operation member from moving in the engagement direction due to the moving force, and when the cassette holder comes to the set position, The cassette detection member is pressed by the cassette holder or the cassette and moves to the second position, and the switch operating member is moved in the engaging direction by the moving force to operate the switch. Features.

Therefore, according to the cassette detection mechanism in the cassette device according to the present invention, while the cassette detection member is in the first position, the switch is not operated by the switch operating member, and the cassette detection member is in the second position. The switch is operated by the switch operation member only after the cassette is moved to the set position, and the cassette detection member is moved to the second position when the cassette holder comes to the set position. It is possible to prevent a predetermined operation from being performed before the set position is reached.
Moreover, since the switch operating member is made movable in the direction orthogonal to the direction of movement of the cassette holding part and the cassette detection member is made to rotate, the size of the cassette device itself in the direction of movement of the cassette holding part can be increased. In other words, malfunction of the cassette device can be prevented without increasing the size of the cassette device itself.

In the above embodiment, the cassette detection lever 57 is rotated by being pressed by the bottom plate 27 of the cassette holding section 26, but there is a portion of the bottom plate 27 corresponding to the rotation end of the cassette detection lever 57. A hole may be formed so that the rotating end of the cassette detection lever 57 is pressed by the lower surface of the cassette 12 through the hole.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the cassette detection mechanism in the cassette device of the present invention. Fig. 1 is a partially exploded perspective view of a video camera using the cassette detection mechanism in the cassette device of the present invention, and Fig. A perspective view showing the entire cassette detection mechanism in the cassette device, FIG. 3 is a partially cutaway plan view, FIG. 4 is an enlarged side view, FIG. 5 is an enlarged internal side view of the main parts, and FIGS. FIG. 7 is an exploded perspective view of the main parts, and FIG. 8 is a perspective view of the main parts. Explanation of symbols: 1...Cassette device, 12...Cassette, 26...Cassette holding part, 39...Engaging part, 41...Lock member, 44...Switch operating member, 54...Switch, 57... Cassette detection member.

Claims (1)

[Scope of Claim for Utility Model Registration] A cassette holder that holds a cassette and moves between a mounting position where the cassette is attached and removed and a setting position where the cassette is set in a predetermined state; a locking member that engages with the engaging portion to lock the cassette holding portion in the set position; a switch operation member to which a moving force is applied to move the member in the direction in which the member engages with the engagement portion, that is, in the same direction as the engagement direction; a switch operated by the switch operation member moving in the same direction; and a first switch operated by the switch operation member moving in the same direction.
a cassette detecting member that rotates between a position of the cassette and a second position that is off the movement trajectory, and has a fulcrum on or near an extension of the moving direction of the switch operating member; When the cassette holding section is in the set position, the cassette detection member is in the first position and prevents the switch operation member from moving in the engaging direction due to the moving force, and when the cassette holding section comes to the set position, the cassette detection member is in the first position. The member is pressed by the cassette holding portion or the cassette and moves to the second position, and the switch operating member is moved in the engaging direction by the moving force to operate the switch. A cassette detection mechanism in a cassette device.